FKIE_CVE-2026-21879

Vulnerability from fkie_nvd - Published: 2026-01-08 02:15 - Updated: 2026-01-20 18:15
Severity ?
4.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below are vulnerable to an Open Redirect attack that allows malicious actors to redirect authenticated users to attacker-controlled websites. By crafting URLs such as //evil.com, attackers can bypass the filter_var($url, FILTER_VALIDATE_URL) validation check. This vulnerability could be exploited to conduct phishing attacks, steal user credentials, or distribute malware. The issue is fixed in version 1.2.49.
References
security-advisories@github.comhttps://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519fPatch
security-advisories@github.comhttps://github.com/kanboard/kanboard/releases/tag/v1.2.49Release Notes
security-advisories@github.comhttps://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcqExploit, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcqExploit, Third Party Advisory
Impacted products
Vendor Product Version
kanboard kanboard *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AFA1D972-E76A-4A20-95F5-68D9915D3797",
              "versionEndExcluding": "1.2.49",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below are vulnerable to an Open Redirect attack that allows malicious actors to redirect authenticated users to attacker-controlled websites. By crafting URLs such as //evil.com, attackers can bypass the filter_var($url, FILTER_VALIDATE_URL) validation check. This vulnerability could be exploited to conduct phishing attacks, steal user credentials, or distribute malware. The issue is fixed in version 1.2.49."
    },
    {
      "lang": "es",
      "value": "Kanboard es un software de gesti\u00f3n de proyectos centrado en la metodolog\u00eda Kanban. Las versiones 1.2.48 e inferiores son vulnerables a un ataque de redirecci\u00f3n abierta que permite a actores maliciosos redirigir a usuarios autenticados a sitios web controlados por el atacante. Al elaborar URLs como //evil.com, los atacantes pueden eludir la comprobaci\u00f3n de validaci\u00f3n filter_var($url, FILTER_VALIDATE_URL). Esta vulnerabilidad podr\u00eda ser explotada para llevar a cabo ataques de phishing, robar credenciales de usuario o distribuir malware. El problema est\u00e1 solucionado en la versi\u00f3n 1.2.49."
    }
  ],
  "id": "CVE-2026-21879",
  "lastModified": "2026-01-20T18:15:10.597",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-01-08T02:15:53.490",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519f"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/kanboard/kanboard/releases/tag/v1.2.49"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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